Carriage-spring.



` No; 732,575. l PATENTBD JUNE so, 1903. L. G. MAYBB.

GARRIAGBSPRING. APPLICATION FILED 00124, 1902` N0 MODEL.

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' UNITED STATES Patented rune so, 1903.

LOUIS G. MAYER, OF CINCINNATI, OHIO.

CARRIAGE-SPRING.

SPECIFICATION forming part of Letters Patent No. 732,575, dated J' une30, 1903.

i Application filedV October 4, 1902. Serial No. 125,871. (No model.)l

To all whom it may concern/- Beit known thatI, LoUIs G. MAYER, acitizenof the United States, residing at Cincinnati, in the county of Hamiltonand State of Ohio, have invented certain-new and useful Improvements inCarriage-Springs, of which the following is a specification.

My invention relates -to that class of springs known as' elliptic orleaf springs.

One of the objects of my invention is to secure the ends of the springby a clamp applied to the extreme end of the spring-leaf, which clamprotates on a center to compensate for the endwise movement of the springas it is elongated by compression.

Another object of my invention is to strengthen the construction vof thespring by doing away with the bolt-eyes in the spring, also in soarranging the clamping members so that the holding force is applied tothe extreme end of the spring. Y

The features of my invention are moreV fully set forth inthe descriptionof the accompanying drawings, forminga part of this specification, inwhich- Figure 1 is a side elevation of the elliptic spring embodying myimprovement. Fig. 2 is a central vertical section with the clamping-boltshown in elevation. Fig. 3 is a section on line m no, Fig. 2. Fig. 4 isa section through said line am, Fig. 2, with the clamping-boltand springremoved. Fig. isa perspective view of one of theclamps. a modificationof Fig. 4.

In the most complete form of construction my spring is composed of twoequal members, shown in Fig. l; butitis adapted to be used with a singlespring member.

vA represents the main leaf of the upper Spring member. t

B represents the inner leaf of the lower member of the spring.

C represents the clamping-bolt.

D represents a segmental vclamp for secu ring the upper spring member toits center;

E represents asegmenta-l clamp' for securing.

the outer end of the lower spring member in position. The forms of thesetwo clamps are practically the same and are constructed primarily asshown in Fig. 5. Each clamp is Eig. 6 is' provided with bolt-openings ain the disks or heads b. In the preferred form the heads b of oneclamping member are inside of the head b of the' opposite clampingmember. The bolt forms the center on which both of these clamping members independently oscillate.

`space between their bases and the concave base of the spring. By thismeans vthe bite of the'clamping member is at the extreme end of 'thespring and insures a more free movement of the spring around the centerthan if the clamp embracedthe spring over the entire concave end. Itwill be observed that the ends of the spring are left a slight distanceasunder, so that each one may be moved without being being obstructed bythe other. Y

It will be observed that the clamping members perform the Same office,one for the upper and the other for the lower leaf, and that each oneoscillates on its center with its respective spring member, and theyeach oscillate or rotate in opposite directions. As each clamp moveswith its respective spring, it avoids friction and secures ease ofmotion.

The spring membersA B are provided with a lip d to insure positiveengagement with its clamping member.

In the modification shown in Fig. 6 I have shown the upper clampingmember provided Y with an overhanging lip e, so as to prevent theentrance of dust and dirt and also to give a `better finished appearanceto the spring.

By the construction herein shown and described several very importantadvantages are obtained. First, each spring (when composed of twomembers) is free to move. upon .a common center entirely independent ofthe other member; second, the clamping force is applied, preferably, tothe outer end of the spring, so that the entire length is free to re-ICO spond to the strains; third, undue heating, Welding, and swaging ofthe spring in order to form a bolt-eye center is avoided.

The center recesses at the end of the springs are shown in the drawingsas semicircnlarand slightly eccentric, so as to bring the clampingstrain on the outer end of the spring, and is the preferred form ofconstruction. I do not wish to limit myself to the semicircular form, asan are of a considerably less extent may be practically employed andstill embody myinvention. This extreme end of the spring ispracticallyan overhanging lip, and its form maybe variously modiliedwithout departing from the principal feature of my invention.

Mode of operation: The spring and clamping members are secured togetherby the clamping-bolt, which forms the center of the spring and clamps.When the springs are compressed, they will elongate and the clampingmembers will each independently rotate on the center bolt, the springand clamp moving together turning on the center bolt. Each spring isfree, therefore, to elongate and move on its center independently of theother. The clamp-bolt serves as a center for each of theindependently-operating clamps and as a common centerfor thetwoindependently-acting spring-leaves.

Having described my invention, I claim-- l. In an elliptic spring, thecombination with a center bolt of the two independentlyrecessed leavesof an independent segmental clamp for each spring, each adapted torotate on a common center bolt and move with its respective springmember in opposite directions, substantially as described.

2. In combination with an elliptic spring member the ends of which arefree to seat upon a common center bolt two segmental clamps, eachindependently connected with the outside spring members, one of which isprovided with a lip upon the outer side which overlaps and closes thespace between each of the opposite segmental clamps, substantially asdescribed.

In testimony whereof I have hereunto set my hand.

LOUIS G. MAYER.

Witnesses:

OLIVER B. KAISER, IDA J. LUCAS.

